John the Stutterer (not to be confused with Stuttering John Melendez) first appeared on the Howard Stern Radio Show as a "Dating Game" contestant with the Dahm Triplets. He won the contest and, due to his severe nervous stuttering, is considered an official Wack Packer. John is unemployed and relies on SSI. He lives in the Rittenhouse Square region of Philadelphia, Pennsylvania.

John has had several on-air fights with Yucko the Clown, who has repeatedly called John a "stuttering prick," while John often accuses Yucko of being a child molester. Recently, John called Yucko a Robin Williams look-a-like. Stern often asks John to act as a judge for various on-air contests. Like 'Wack Packer' Hank the Angry Drunken Dwarf, John is very good at classic rock trivia.

Sound effects man Fred Norris often tries to exacerbate John's stuttering by doing a stammering impression as John speaks. Some have accused John of faking his stutter, either for the publicity or malingering. He can speak clearly on some occasions, especially when angry. Norris will frequently call attention to instances where John loses his stutter.

John claims to suffer from psychological problems including obsessive compulsive disorder and depression. Some Stern Show staff have suggested that the stuttering may be a side-effect of drug use. John has refused offers of free professional treatment, arguing that without the speech impediment, he would have no excuse for his failures in life. John has appeared in a few low-budget porno films, but on August 16, 2006, John declared himself "retired" from the industry after being embarrassed on-air by "G-Spot", a former porn co-star.

On March 8th, 2007 he defeated Howard TV director Scott Depace in a political debate dubbed the "Not So Great Debate" by 3-1 margin as voted by the listeners. Although he won, he was ridiculed by the staff for talking too long and not getting to the point quick enough.

Debuting on July 30th, 2007, John got his own show on Howard 101, discussing various political topic. Surprisingly Howard & the staff were impressed with the show, and Tim Saeban said it will go on for another episode.